A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic fragility and cost-benefit analysis of a conventional bridge with retrofit implements
https://orcid.org/0000-0003-3081-2985
Abstract Fragility analysis is a well-known tool to evaluate the impact of different retrofit measures on damage probability of structures. In this study, the performances of a conventional multi-span continuous (MSC) concrete girder bridge reinforced with different seismic control devices were investigated. The original bridge is supported by both elastomeric bearings and exterior shear keys. For other retrofitting solutions, lead rubber bearings (LRB), friction pendulum systems (FPS), and buckling-restrained braces (BRB) were considered and compared to the original structure of the bridge in terms of seismic performances and economical costs. To analyze the seismic performances, the fragility curves based on the probabilistic seismic demand model were extracted under various near-field and far-field ground motions. Additionally, cost-benefit analyses were performed to determine the benefit of using each of the devices economically. The results indicated that both LRB and FPS significantly reduced the damage probability of substructure, while FPS provided the bridge with high vulnerability in abutment seat at slight and moderate levels of damage. Also, the installation of BRB seismically was an efficient solution and decreased the damage probability of the bridge system. Based on the results of fragility and cost-benefit analysis, LRB was found to be a beneficial implement for the studied bridge.
Highlights A conventional bridge was considered, and the as-built performance of the bridge was compared to the retrofitted ones, including seismic isolations and buckling restrained brace. By using nonlinear time history analysis and Opensees, fragility analysis was conducted for each model based on two criteria (column curvature ductility and abutment seat displacement). In the paper, the significance of seismic retrofit implements in terms economically was considered, and the cost-benefit analysis was utilized.
Seismic fragility and cost-benefit analysis of a conventional bridge with retrofit implements
https://orcid.org/0000-0003-3081-2985
Abstract Fragility analysis is a well-known tool to evaluate the impact of different retrofit measures on damage probability of structures. In this study, the performances of a conventional multi-span continuous (MSC) concrete girder bridge reinforced with different seismic control devices were investigated. The original bridge is supported by both elastomeric bearings and exterior shear keys. For other retrofitting solutions, lead rubber bearings (LRB), friction pendulum systems (FPS), and buckling-restrained braces (BRB) were considered and compared to the original structure of the bridge in terms of seismic performances and economical costs. To analyze the seismic performances, the fragility curves based on the probabilistic seismic demand model were extracted under various near-field and far-field ground motions. Additionally, cost-benefit analyses were performed to determine the benefit of using each of the devices economically. The results indicated that both LRB and FPS significantly reduced the damage probability of substructure, while FPS provided the bridge with high vulnerability in abutment seat at slight and moderate levels of damage. Also, the installation of BRB seismically was an efficient solution and decreased the damage probability of the bridge system. Based on the results of fragility and cost-benefit analysis, LRB was found to be a beneficial implement for the studied bridge.
Highlights A conventional bridge was considered, and the as-built performance of the bridge was compared to the retrofitted ones, including seismic isolations and buckling restrained brace. By using nonlinear time history analysis and Opensees, fragility analysis was conducted for each model based on two criteria (column curvature ductility and abutment seat displacement). In the paper, the significance of seismic retrofit implements in terms economically was considered, and the cost-benefit analysis was utilized.
Seismic fragility and cost-benefit analysis of a conventional bridge with retrofit implements
https://orcid.org/0000-0003-3081-2985
Abstract Fragility analysis is a well-known tool to evaluate the impact of different retrofit measures on damage probability of structures. In this study, the performances of a conventional multi-span continuous (MSC) concrete girder bridge reinforced with different seismic control devices were investigated. The original bridge is supported by both elastomeric bearings and exterior shear keys. For other retrofitting solutions, lead rubber bearings (LRB), friction pendulum systems (FPS), and buckling-restrained braces (BRB) were considered and compared to the original structure of the bridge in terms of seismic performances and economical costs. To analyze the seismic performances, the fragility curves based on the probabilistic seismic demand model were extracted under various near-field and far-field ground motions. Additionally, cost-benefit analyses were performed to determine the benefit of using each of the devices economically. The results indicated that both LRB and FPS significantly reduced the damage probability of substructure, while FPS provided the bridge with high vulnerability in abutment seat at slight and moderate levels of damage. Also, the installation of BRB seismically was an efficient solution and decreased the damage probability of the bridge system. Based on the results of fragility and cost-benefit analysis, LRB was found to be a beneficial implement for the studied bridge.
Highlights A conventional bridge was considered, and the as-built performance of the bridge was compared to the retrofitted ones, including seismic isolations and buckling restrained brace. By using nonlinear time history analysis and Opensees, fragility analysis was conducted for each model based on two criteria (column curvature ductility and abutment seat displacement). In the paper, the significance of seismic retrofit implements in terms economically was considered, and the cost-benefit analysis was utilized.
Seismic fragility and cost-benefit analysis of a conventional bridge with retrofit implements
Montazeri, Maryam (author) / Ghodrati Amiri, Gholamreza (author) / Namiranian, Pejman (author)
2020-10-07
Article (Journal)
Electronic Resource
English
Optimizing Bridge Seismic Retrofit Strategy: Implementing Bridge Fragility Curves
| British Library Conference Proceedings | 2006
Cost-benefit analysis of bridge seismic retrofit in a highway transportation network
| British Library Conference Proceedings | 2010
Risk-based seismic life-cycle cost–benefit (LCC-B) analysis for bridge retrofit assessment
| Online Contents | 2010